MISP contains a vulnerability in its one-time password (OTP) authentication flow that allows replay of a consumed HOTP (paper) token and rewinding of the token counter.<\/p>\n
The HOTP verification logic compared the submitted token against a counter value that was cached in the user’s session at the time the password was entered, rather than against the authoritative counter stored in the database. Because the session-cached counter is not updated after a token is successfully consumed, an attacker who holds a valid session (password already submitted) can reuse a previously burned HOTP token. The stale cached counter still matches the replayed token, granting a second successful authentication and effectively rewinding the counter state.<\/p>\n
Preconditions:<\/p>\n
– The target user has HOTP (paper token) second-factor authentication enabled.<\/p>\n
– The attacker possesses a valid session in which the password step has already been completed (the OTP step is pending).<\/p>\n
– The attacker has access to at least one HOTP token value (e.g., a paper token list).<\/p>\n
Security impact:<\/p>\n
– Bypass of the second authentication factor, allowing unauthorized access to a user’s MISP account.<\/p>\n
– Corruption of the HOTP counter state, potentially invalidating subsequent legitimate tokens or enabling further replays.<\/p>\n
Affected versions: <2.5.48.<\/p>\n","protected":false},"excerpt":{"rendered":"
MISP contains a vulnerability in its one-time password (OTP) authentication flow that allows replay of a consumed HOTP (paper) token and rewinding of the token counter.<\/p>\n
The HOTP verification logic co<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-31698","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/31698","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31698"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31698"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31698"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}